README: document message types; taro-ctl: fix 0-length message sending; taro-ls: fix 0-length message reading and list length off-by-1 error

README.md

@@ -4,11 +4,20 @@
 
 ## messages
 
+Messages are in the format `[1][2:3][...]`:
+- byte 1 is the message type
+- bytes 2 and 3 are the length of the message, in bytes
+- bytes 4 and beyond are the message itself (payload) - won't be present if the length is 0
+
 Even messages go from `taro-ctl` to the `uxn` windows.
 
 - `0`: mailbox list
-- `2`: list mail in mailbox
+- `2`: list mail in current mailbox
 
 Odd messages go from the `uxn` windows to `taro-ctl`.
 
-- `1`: change/refresh mailbox
+- `1`: change/refresh mailbox; payload is the mailbox to read
+- `3`: mark all as read in current mailbox; no payload
+- `5`: search mail; payload is the regex
+- `7`: refile mail; payload is a mblaze msg number/range, a space, and then the mailbox name
+- `9`: trash mail; payload is a mblaze msg number/range

taro-ctl.cr

@@ -74,19 +74,13 @@ module Taro
     def write_msg(msgtype : UInt8, data : Slice)
       msgsz = UInt16.new(data.size > 16384 ? 16384 : data.size)
       msgtype.to_io(@stdin_w, IO::ByteFormat::BigEndian)
-      if msgsz != 0
       msgsz.to_io(@stdin_w, IO::ByteFormat::BigEndian)
-      else
-        8_u16.to_io(@stdin_w, IO::ByteFormat::BigEndian)
-      end
       
       if msgsz == 16384
         @stdin_w.write(data[0..msgsz - 2])
         10_u8.to_io(@stdin_w, IO::ByteFormat::BigEndian)
       elsif msgsz != 0
         @stdin_w.write(data[0..msgsz - 1])
-      else
-        @stdin_w.write("nothing\n".to_slice)
       end
     end
     

taro-ls.tal

@@ -145,6 +145,19 @@ BRK
   &count_2
   .Console/read DEI .decoding/count INC STZ
   #00 .decoding/counting STZ
+  .decoding/count LDZ2 #0000 NEQ2 ,&has_data JCN
+    .decoding/msg_type LDZ
+    DUP MBOX_LIST NEQ ,&no_mbox_empty JCN
+      POP #0000 .mboxes/bytes STZ2 decode_is_done POP
+      ,&done JMP
+    &no_mbox_empty
+    DUP MAIL_LIST NEQ ,&no_mail_empty JCN
+      POP
+      #0000 .list/bytes STZ2 decode_is_done POP
+      ,&done JMP
+    &no_mail_empty
+    POP
+  &has_data
 
 BRK
 
@@ -611,7 +624,7 @@ JMP2r
   &continue INC2 ,&while JMP
   &end
   
-  STHkr LB_OFFSET LDZ2 #0001 SUB2 STHr LB_LEN STZ2 POP2 POP2
+  STHkr LB_OFFSET LDZ2 STHr LB_LEN STZ2 POP2 POP2
 
 JMP2r